Bibby Marine has published analysis examining the potential cost implications of electrifying Commissioning Service Operation Vessels used in the offshore wind sector. According to the company, hybrid electric CSOVs could reduce operating costs by up to 40 per cent compared with conventionally fuelled vessels from the start of operations. When operated in fully electric mode with offshore charging available, cost reductions of up to 70 per cent are projected.
Hybrid eCSOVs use dual-fuel generator sets to charge onboard batteries that provide primary electric propulsion when offshore charging is not available. In this configuration, engine load and speed can be optimised to lower fuel consumption and associated carbon costs. Bibby Marine estimates potential savings of around USD 1 million per year. In fully electric mode, with offshore charging and no direct carbon emissions, annual savings could reach approximately USD 1.8 million.
European carbon emission regulations affecting vessels servicing offshore wind farms are due to take effect from 2027. With around 45 GW of installed offshore wind capacity in the North Sea, vessel operating costs are expected to be increasingly influenced by fuel use and emissions-related charges.
Bibby Marine states that the required battery and charging technologies are commercially available. Offshore charging systems have been integrated into wind turbines and can also be deployed via monopile or floating connections. The company notes that wider deployment will depend on collaboration between ports, wind farm developers, turbine manufacturers and charging equipment suppliers, as well as regulatory and permitting frameworks.
